/Engine/Plugins/FX/Niagara/Source/NiagaraEditor/Public/NiagaraGraph.h
Find all output nodes.
void FindOutputNodes ( [ENiagaraScriptUsage](API\Plugins\Niagara\ENiagaraScriptUsage) TargetUsageType, [TArray](API\Runtime\Core\Containers\TArray)< [UNiagaraNodeOutput](API\Plugins\NiagaraEditor\UNiagaraNodeOutput) * > & OutputNodes ) const